config: reorder items in "Busybox Settings", improve help
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
parent
a3df2fa525
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2c8929c7af
132
Config.in
132
Config.in
@ -12,10 +12,14 @@ config HAVE_DOT_CONFIG
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menu "Busybox Settings"
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config DESKTOP
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bool "Enable options for full-blown desktop systems"
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bool "Enable compatibility for full-blown desktop systems"
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default y
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help
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Enable options and features which are not essential.
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Enable applet options and features which are not essential.
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Many applet options have dedicated config options to (de)select them
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under that applet; this options enables those options which have no
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individual config item for them.
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Select this if you plan to use busybox on full-blown desktop machine
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with common Linux distro, which needs higher level of command-line
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compatibility.
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@ -42,13 +46,12 @@ config INCLUDE_SUSv2
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will be supported in head, tail, and fold. (Note: should
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affect renice too.)
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config USE_PORTABLE_CODE
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bool "Avoid using GCC-specific code constructs"
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default n
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config LONG_OPTS
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bool "Support --long-options"
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default y
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help
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Use this option if you are trying to compile busybox with
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compiler other than gcc.
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If you do use gcc, this option may needlessly increase code size.
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Enable this if you want busybox applets to use the gnu --long-option
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style, in addition to single character -a -b -c style options.
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config SHOW_USAGE
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bool "Show applet usage messages"
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@ -84,40 +87,8 @@ config FEATURE_COMPRESS_USAGE
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and have very little memory, this might not be a win. Otherwise,
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you probably want this.
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config BUSYBOX
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bool "Include busybox applet"
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default y
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help
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The busybox applet provides general help regarding busybox and
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allows the included applets to be listed. It's also required
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if applet links are to be installed at runtime. If you unselect
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this option, running busybox without any arguments will give
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just a cryptic error message:
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$ busybox
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busybox: applet not found
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Running "busybox APPLET [ARGS...]" will still work, of course.
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config FEATURE_INSTALLER
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bool "Support --install [-s] to install applet links at runtime"
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default y
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depends on BUSYBOX
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help
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Enable 'busybox --install [-s]' support. This will allow you to use
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busybox at runtime to create hard links or symlinks for all the
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applets that are compiled into busybox.
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config INSTALL_NO_USR
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bool "Don't use /usr"
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default n
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help
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Disable use of /usr. busybox --install and "make install"
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will install applets only to /bin and /sbin,
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never to /usr/bin or /usr/sbin.
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config LFS
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bool "Build with Large File Support (for accessing files > 2 GB)"
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bool "Support files > 2 GB"
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default y
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help
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If you want to build BusyBox with large file support, then enable
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@ -125,7 +96,7 @@ config LFS
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library lacks large file support for large files. Some of the
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programs that can benefit from large file support include dd, gzip,
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cp, mount, tar, and many others. If you want to access files larger
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than 2 Gigabytes, enable this option. Otherwise, leave it set to 'N'.
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than 2 Gigabytes, enable this option.
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config PAM
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bool "Support PAM (Pluggable Authentication Modules)"
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@ -134,13 +105,6 @@ config PAM
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Use PAM in some busybox applets (currently login and httpd) instead
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of direct access to password database.
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config LONG_OPTS
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bool "Support --long-options"
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default y
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help
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Enable this if you want busybox applets to use the gnu --long-option
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style, in addition to single character -a -b -c style options.
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config FEATURE_DEVPTS
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bool "Use the devpts filesystem for Unix98 PTYs"
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default y
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@ -189,8 +153,40 @@ config PID_FILE_PATH
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this value. The option has no effect on applets that require you to
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specify a pidfile path.
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config BUSYBOX
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bool "Include busybox applet"
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default y
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help
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The busybox applet provides general help regarding busybox and
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allows the included applets to be listed. It's also required
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if applet links are to be installed at runtime. If you unselect
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this option, running busybox without any arguments will give
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just a cryptic error message:
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$ busybox
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busybox: applet not found
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Running "busybox APPLET [ARGS...]" will still work, of course.
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config FEATURE_INSTALLER
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bool "Support --install [-s] to install applet links at runtime"
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default y
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depends on BUSYBOX
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help
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Enable 'busybox --install [-s]' support. This will allow you to use
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busybox at runtime to create hard links or symlinks for all the
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applets that are compiled into busybox.
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config INSTALL_NO_USR
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bool "Don't use /usr"
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default n
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help
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Disable use of /usr. busybox --install and "make install"
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will install applets only to /bin and /sbin,
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never to /usr/bin or /usr/sbin.
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config FEATURE_SUID
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bool "Support SUID/SGID handling"
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bool "Drop SUID state for most applets"
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default y
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help
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With this option you can install the busybox binary belonging
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@ -198,16 +194,16 @@ config FEATURE_SUID
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root-level operations even when run by ordinary users
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(for example, mounting of user mounts in fstab needs this).
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Busybox will automatically drop privileges for applets
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that don't need root access.
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With this option enabled, Busybox drops privileges for applets
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that don't need root access, before entering their main() function.
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If you are really paranoid and don't want to do this, build two
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busybox binaries with different applets in them (and the appropriate
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symlinks pointing to each binary), and only set the suid bit on the
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one that needs it.
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If you are really paranoid and don't want even initial busybox code
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to run under root for evey applet, build two busybox binaries with
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different applets in them (and the appropriate symlinks pointing
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to each binary), and only set the suid bit on the one that needs it.
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The applets which require root rights (need suid bit or
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to be run by root) and will refuse to execute otherwise:
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Some applets which require root rights (need suid bit on the binary
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or to be run by root) and will refuse to execute otherwise:
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crontab, login, passwd, su, vlock, wall.
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The applets which will use root rights if they have them
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@ -215,16 +211,16 @@ config FEATURE_SUID
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without root right nevertheless:
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findfs, ping[6], traceroute[6], mount.
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Note that if you DONT select this option, but DO make busybox
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Note that if you DO NOT select this option, but DO make busybox
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suid root, ALL applets will run under root, which is a huge
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security hole (think "cp /some/file /etc/passwd").
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config FEATURE_SUID_CONFIG
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bool "Runtime SUID/SGID configuration via /etc/busybox.conf"
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bool "Enable SUID configuration via /etc/busybox.conf"
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default y
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depends on FEATURE_SUID
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help
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Allow the SUID / SGID state of an applet to be determined at runtime
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Allow the SUID/SGID state of an applet to be determined at runtime
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by checking /etc/busybox.conf. (This is sort of a poor man's sudo.)
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The format of this file is as follows:
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@ -244,7 +240,7 @@ config FEATURE_SUID_CONFIG
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[SUID]
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su = ssx root.0 # applet su can be run by anyone and runs with
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# euid=0/egid=0
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# euid=0,egid=0
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su = ssx # exactly the same
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mount = sx- root.disk # applet mount can be run by root and members
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@ -280,8 +276,9 @@ config FEATURE_PREFER_APPLETS
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call 'exec' to try and find an applicable busybox applet before
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searching the PATH. This is typically done by exec'ing
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/proc/self/exe.
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This may affect shell, find -exec, xargs and similar applets.
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They will use applets even if /bin/<applet> -> busybox link
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They will use applets even if /bin/APPLET -> busybox link
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is missing (or is not a link to busybox). However, this causes
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problems in chroot jails without mounted /proc and with ps/top
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(command name can be shown as 'exe' for applets started this way).
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@ -308,6 +305,7 @@ config SELINUX
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will not compile. Specifially, libselinux 1.28 or better is
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directly required by busybox. If the installation is located in a
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non-standard directory, provide it by invoking make as follows:
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CFLAGS=-I<libselinux-include-path> \
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LDFLAGS=-L<libselinux-lib-path> \
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make
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@ -513,6 +511,14 @@ config EXTRA_LDLIBS
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help
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Additional LDLIBS to pass to the linker with -l.
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config USE_PORTABLE_CODE
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bool "Avoid using GCC-specific code constructs"
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default n
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help
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Use this option if you are trying to compile busybox with
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compiler other than gcc.
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If you do use gcc, this option may needlessly increase code size.
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comment 'Installation Options ("make install" behavior)'
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choice
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